Name:
____________________________
Hrs. Spent studying for this exam: ____
GEO 124: Physical Landforms
EXAM III:
Part I: Multiple-multiple Choice. Remember
that there may one, two, three, or four correct choices for a question and that
to receive full credit you must circle all the correct choices and none of
the incorrect ones. Two points each.
1.
Wind
a.
is the most effective agent of gradation in creating
landforms.
b.
is the least effective agent of gradation in creating
landforms.
c.
moves more small particles than large ones.
d.
moves more large particles than small ones.
2.
A longitudinal
dune
a.
is crescent (curved like a half-moon) shaped.
b.
is created when wind blows from four or five
directions over the course of a year.
c.
is basically long and straight.
d.
is the same thing as a blow-out dune.
3.
In a river
a.
water velocity increases during flood events, resulting
in bed erosion.
b.
water velocity increases when the river enters an ocean,
causing scouring of the delta.
c.
water velocity decreases on the inside of a meander,
resulting in deposition.
d.
water velocity decreases in a narrow area of a river,
resulting in deposition.
4.
Rivers of
internal drainage
a.
lose water as they flow toward their mouth.
b.
gain water from the water table.
c.
are found in humid environments.
d.
have many tributaries.
5.
River load
a.
can include material too heavy to be suspended in the
water.
b.
abrades the bed and bank.
c.
is deposited along natural levees when the river
reaches flood stage.
d.
is deposited when velocity increases.
6.
Entrenched meanders
a.
are found in the unconsolidated sediments of the
floodplain.
b.
occur when the vertical distance between the river bed
and the river’s base level is increased.
c.
are trapped in solid rock.
d.
are found along the
7.
Geysers
a.
erupt more frequently during droughts because water is
attempting to reach the surface of the ground to replenish the drought-deprived
areas.
b.
have a constriction (tightened opening) at the surface.
c.
erupt less frequently in droughts than during more moist
periods.
d.
erupt water that is very cold, almost freezing.
8.
Stalagmites
a.
are usually found beneath stalactites.
b.
are made of carbonate-based rocks.
c.
are the same thing as karst towers.
d.
form in arid environments.
9.
A swallow hole
a.
is a sinkhole.
b.
is a connection to the groundwater.
c.
is a pothole.
d.
has a stream that runs into it.
10.
In the Gros
Ventre slide disaster,
a.
a landslide wiped out a town, killing 245 people.
b.
slide debris blocked a river, causing a lake to form.
c.
a flood later occurred, killing people downstream.
d.
campers in a campground were killed by the slide.
Part II: Definitions.
Place the term or value defined in the
space provided. Two points each.
1. ___________________________ The general term for a sand dunes that move.
2. ___________________________ Ultimate
base level.
3. ___________________________ A synonym for a watershed.
4. ___________________________ A stalactite that has a hole in the middle.
5. ___________________________ A region characterized by karst towers.
6. ___________________________ The general term for mass movement that incorporates a high
water content in the moving material.
7. ___________________________ The landform created from freeze-thaw weathering followed by
mass movement of weathered materials.
8. ___________________________ A mudflow created by melting of glaciers as a result of a
volcanic eruption.
9. ___________________________ The general term for beaches made of smooth rocks (rather
than sand grains).
10. ___________________________ A wall built out into a large lake or ocean, designed to
slow currents and cause deposition of sand to enlarge a beach.
11. ___________________________ The cause of most waves.
Part III: Diagram/Short Answer
1.
Diagram a star
dune from above, showing the direction(s) from which the wind blows to create
the dune. Two points.
2.
Diagram a side
view of a sand dune, showing and labeling the windward and lee sides. Show the direction of wind with an
arrow. Three points.
3.
Diagram a
radial drainage pattern and then below your diagram indicate what type(s) of
landforms would produce a radial drainage pattern. Three points.
Pattern:
Landform the produces a radial drainage pattern:
_______________
4.
Diagram a
cross-section of a river at bankfull stage.
Then diagram the same river at flood stage, being careful to show the
difference between the two. Four points.
Bankfull: Flood:
5.
Diagram a river
profile, showing and labeling the steep and gentle gradient sections. be certain to label
the axes of the profile. Three points.
6.
Diagram a top
view of a typical river in the gentle gradient section of its profile. Show and label each of the following. Please do not use a letter or number for each of these. Rather, write out the term and connect your
work with an arrow to the correct feature in your diagram. Five points.
meander
cutbank
point
bar
natural
levee
floodplain
7.
Next to each of
the features in the table, indicate with a check in the proper column whether
it is created by erosion of deposition.
Three points
|
Feature |
Erosional |
Depositional |
|
Natural levee |
|
|
|
Delta |
|
|
|
Valley |
|
|
|
Cut bank (undercut slope) |
|
|
|
Pothole |
|
|
|
Point Bar |
|
|
8.
Diagram a cross-section
of a river (not a top view!) and show and label the point bar and the cut
bank. Two points.
9.
Diagram the
structures that give rise to artesian wells.
Show and label the aquifer, aquacludes, the recharge area, and the
well. Four points.
10.
List four
factors that are necessary for the formation of karst landscapes. Four points.
a.
b.
c.
d.
11.
Diagram a
mogote and a karst tower, showing the difference between them. Two points.
Mogote: Karst
tower:
12.
List (and
briefly explain if necessary) four driving forces that induce mass
movement. Four points.
a.
b.
c.
d.
13.
Explain very
briefly how vegetation can be a resisting force and how it can be a driving force in mass
movement. Four points.
a. How vegetation be a resisting force:
b. How it can be a driving force:
14.
Diagram a wave,
showing and labeling the wave crest, trough, height, and length. Two points.
15.
Diagram and
label swash and backwash and explain how they result in sand movement along a
beach. Four points.
16.
What happens to
wave height as a wave approached land and why?
Three points.
Part IV: Place Names.
Place each of the following in the
proper location on the attached map. One
point each.
1.
Rocky Mountains
2.
Juan de Fuca
plate
3.
Nile River
4.
Iceland
5.
South Africa
6.
Mississippi
River
Place each of
the following in the proper location.
One point each.
1. Rocky Mountains
2. Juan de Fuca plate
3. Nile River
4. Iceland
5. South Africa
6. Mississippi River